AutoCodes – Mercedes-Benz – P0202 Mercedes-Benz

P0202 Mercedes-Benz Code - Injector Circuit/Open Cylinder 2

Quick Answer

This fault code is stored in the Engine Control Module (ECM) when the injector control circuit does not behave as expected. Common causes include Faulty fuel injector 2, Fuel Injector 2 harness is open or shorted, Fuel Injector #2 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0202 Mercedes-Benz indicates Injector Circuit/Open Cylinder 2.
Common causes: Common causes include Faulty fuel injector 2, Fuel Injector 2 harness is open or shorted, Fuel Injector #2 circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 19,149

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 11, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0202 Mercedes-Benz Description

This fault code is stored in the Engine Control Module (ECM) when the injector control circuit does not behave as expected. The ECM uses the induced voltage from the injector to indicate that the fuel injector circuit is operating correctly electrically. It does not signal the mechanical condition of the injector. When the ECM opens the ground circuit for an injector (to cease current flow) a voltage is induced into the winding. This voltage shows the electrical integrity of the injector and associated wiring. Absence of this induced voltage results in a fault code being stored in the ECM. This code is generated if the fault is associated with cylinder 2.

OBDII Code P0202 Mercedes-Benz - Injector Circuit/Open Cylinder 2 - AutoCodes.com — P0202 Mercedes-Benz Code - Injector Circuit/Open Cylinder 2

What does this mean?

What are the Possible Causes of the DTC P0202 Mercedes-Benz?

Faulty fuel injector 2
Fuel Injector 2 harness is open or shorted
Fuel Injector #2 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0202 Mercedes-Benz?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

Mercedes Benz Code = 0319 The injection valve output stage of cylinder 2 detects a line discontinuity. (P0202)

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0202 Mercedes-Benz code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0202 Mercedes-Benz code?

Need more information on how to fix the P0202 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0202 Mercedes-Benz code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0202 Mercedes-Benz Code

1. What are the common symptoms of OBDII code P0202 in a Mercedes-Benz related to the Injector Circuit/Open Cylinder 2?

The common symptoms include engine misfires, rough idling, poor fuel efficiency, and potential stalling of the vehicle.

2. What are the possible causes of OBDII code P0202 in a Mercedes-Benz?

The code P0202 typically indicates an issue with the fuel injector for Cylinder 2, which could be caused by a faulty injector, wiring problems, or an issue with the Engine Control Module (ECM).

3. How can I diagnose the cause of OBDII code P0202 in my Mercedes-Benz?

You can use a multimeter to check the resistance of the fuel injector for Cylinder 2, inspect the wiring for any damage or loose connections, and perform a thorough visual inspection for any signs of corrosion or debris.

4. Can I continue driving my Mercedes-Benz with OBDII code P0202?

It is not recommended to drive your vehicle with code P0202 as it can lead to further engine damage or issues. It is best to address the problem promptly to prevent more serious consequences.

5. What are some repair tips for resolving OBDII code P0202 in a Mercedes-Benz?

Repair tips include replacing the fuel injector for Cylinder 2 if it's faulty, repairing any damaged wiring, and resetting the ECM to clear the code and see if it reoccurs.

6. How much does it typically cost to repair OBDII code P0202 in a Mercedes-Benz?

The cost of repairing code P0202 can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

7. Is it possible to reset OBDII code P0202 in a Mercedes-Benz without fixing the underlying issue?

While you can reset the code using an OBDII scanner, it is crucial to address the root cause of the problem to prevent the code from reappearing and causing potential engine damage.

8. Can a DIY enthusiast fix OBDII code P0202 in a Mercedes-Benz?

DIY enthusiasts with good automotive repair skills and the necessary tools can attempt to fix code P0202, especially if the issue is with the fuel injector or wiring. However, more complex problems may require professional expertise.

9. How urgent is it to address OBDII code P0202 in a Mercedes-Benz?

It is advisable to address code P0202 promptly to prevent potential engine damage, decreased performance, and safety risks associated with driving a vehicle experiencing injector circuit/open cylinder issues.

10. Will OBDII code P0202 cause my Mercedes-Benz to fail an emissions test?

Yes, OBDII code P0202 can lead to failed emissions tests as it indicates a problem with the fuel injector circuit, which can affect the vehicle's emissions control system. Fixing the issue is necessary to pass emissions testing.